Organised by UNESCO's World Heritage Centre and the University of Florida (College of Design, Construction and Planning Preservation Programs). 20 experts, 10 from the USA, 9 from Canada and one from Brazil, were invited by the Director of the World Heritage Centre to discuss identification, protection, conservation and potential nomination of properties and sites of Modern Heritage in North America. Presented as case studies were, among others, The Distant Early Warning (DEW) Line Station network in the Canadian Arctic; Miami Beach Heritage & Art Deco District; Habitat 67, Montreal; Marina City, Chicago; Grain elevators of Saskatchewan; The former Visitor Centre at Gettysburg National Military Park; and The Buildings of Frank Lloyd Wright.